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-rw-r--r--weed/Makefile5
-rw-r--r--weed/command/command.go1
-rw-r--r--weed/command/master_follower.go145
-rw-r--r--weed/pb/grpc_client_server.go15
-rw-r--r--weed/pb/master.proto2
-rw-r--r--weed/pb/master_pb/master.pb.go241
-rw-r--r--weed/server/master_grpc_server_volume.go4
-rw-r--r--weed/server/master_server.go9
8 files changed, 306 insertions, 116 deletions
diff --git a/weed/Makefile b/weed/Makefile
index ad1f0b6f9..205104969 100644
--- a/weed/Makefile
+++ b/weed/Makefile
@@ -41,3 +41,8 @@ debug_filer_copy:
debug_filer_remote_sync:
go build -gcflags="all=-N -l"
dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 filer.remote.sync -filer="localhost:8888" -dir=/buckets/b2 -timeAgo=10000h
+
+debug_master_follower:
+ go build -gcflags="all=-N -l"
+ dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 master.follower
+
diff --git a/weed/command/command.go b/weed/command/command.go
index 02de2bd35..a3fdcfc6f 100644
--- a/weed/command/command.go
+++ b/weed/command/command.go
@@ -28,6 +28,7 @@ var Commands = []*Command{
cmdFuse,
cmdGateway,
cmdMaster,
+ cmdMasterFollower,
cmdMount,
cmdS3,
cmdIam,
diff --git a/weed/command/master_follower.go b/weed/command/master_follower.go
new file mode 100644
index 000000000..949743b3e
--- /dev/null
+++ b/weed/command/master_follower.go
@@ -0,0 +1,145 @@
+package command
+
+import (
+ "context"
+ "fmt"
+ "github.com/aws/aws-sdk-go/aws"
+ "github.com/chrislusf/seaweedfs/weed/glog"
+ "github.com/chrislusf/seaweedfs/weed/pb"
+ "github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+ "github.com/chrislusf/seaweedfs/weed/security"
+ "github.com/chrislusf/seaweedfs/weed/server"
+ "github.com/chrislusf/seaweedfs/weed/util"
+ "github.com/gorilla/mux"
+ "google.golang.org/grpc/reflection"
+ "net/http"
+ "strconv"
+ "strings"
+ "time"
+)
+
+var (
+ mf MasterOptions
+)
+
+func init() {
+ cmdMasterFollower.Run = runMasterFollower // break init cycle
+ mf.port = cmdMasterFollower.Flag.Int("port", 9334, "http listen port")
+ mf.ipBind = cmdMasterFollower.Flag.String("ip.bind", "", "ip address to bind to")
+ mf.peers = cmdMasterFollower.Flag.String("masters", "localhost:9333", "all master nodes in comma separated ip:port list, example: 127.0.0.1:9093,127.0.0.1:9094,127.0.0.1:9095")
+
+ mf.ip = aws.String(util.DetectedHostAddress())
+ mf.metaFolder = aws.String("")
+ mf.volumeSizeLimitMB = nil
+ mf.volumePreallocate = nil
+ mf.defaultReplication = nil
+ mf.garbageThreshold = aws.Float64(0.1)
+ mf.whiteList = nil
+ mf.disableHttp = aws.Bool(false)
+ mf.metricsAddress = aws.String("")
+ mf.metricsIntervalSec = aws.Int(0)
+ mf.raftResumeState = aws.Bool(false)
+}
+
+var cmdMasterFollower = &Command{
+ UsageLine: "master.follower -port=9333 -masters=<master1Host>:<master1Port>",
+ Short: "start a master follower",
+ Long: `start a master follower to provide volume=>location mapping service
+
+ The master follower does not participate in master election.
+ It just follow the existing masters, and listen for any volume location changes.
+
+ In most cases, the master follower is not needed. In big data centers with thousands of volume
+ servers. In theory, the master may have trouble to keep up with the write requests and read requests.
+
+ The master follower can relieve the master from from read requests, which only needs to
+ lookup a fileId or volumeId.
+
+ The master follower currently can handle fileId lookup requests:
+ /dir/lookup?volumeId=4
+ /dir/lookup?fileId=4,49c50924569199
+ And gRPC API
+ rpc LookupVolume (LookupVolumeRequest) returns (LookupVolumeResponse) {}
+
+ This master follower is stateless and can run from any place.
+
+ `,
+}
+
+func runMasterFollower(cmd *Command, args []string) bool {
+
+ util.LoadConfiguration("security", false)
+ util.LoadConfiguration("master", false)
+
+ startMasterFollower(mf)
+
+ return true
+}
+
+func startMasterFollower(masterOptions MasterOptions) {
+
+ // collect settings from main masters
+ masters := strings.Split(*mf.peers, ",")
+ masterGrpcAddresses, err := pb.ParseServersToGrpcAddresses(masters)
+ if err != nil {
+ glog.V(0).Infof("ParseFilerGrpcAddress: %v", err)
+ return
+ }
+
+ grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.master")
+ for i := 0; i < 10; i++ {
+ err = pb.WithOneOfGrpcMasterClients(masterGrpcAddresses, grpcDialOption, func(client master_pb.SeaweedClient) error {
+ resp, err := client.GetMasterConfiguration(context.Background(), &master_pb.GetMasterConfigurationRequest{})
+ if err != nil {
+ return fmt.Errorf("get master grpc address %v configuration: %v", masterGrpcAddresses, err)
+ }
+ masterOptions.defaultReplication = &resp.DefaultReplication
+ masterOptions.volumeSizeLimitMB = aws.Uint(uint(resp.VolumeSizeLimitMB))
+ masterOptions.volumePreallocate = &resp.VolumePreallocate
+ return nil
+ })
+ if err != nil {
+ glog.V(0).Infof("failed to talk to filer %v: %v", masterGrpcAddresses, err)
+ glog.V(0).Infof("wait for %d seconds ...", i+1)
+ time.Sleep(time.Duration(i+1) * time.Second)
+ }
+ }
+ if err != nil {
+ glog.Errorf("failed to talk to filer %v: %v", masterGrpcAddresses, err)
+ return
+ }
+
+
+ option := masterOptions.toMasterOption(nil)
+ option.IsFollower = true
+
+
+ r := mux.NewRouter()
+ ms := weed_server.NewMasterServer(r, option, masters)
+ listeningAddress := *masterOptions.ipBind + ":" + strconv.Itoa(*masterOptions.port)
+ glog.V(0).Infof("Start Seaweed Master %s at %s", util.Version(), listeningAddress)
+ masterListener, e := util.NewListener(listeningAddress, 0)
+ if e != nil {
+ glog.Fatalf("Master startup error: %v", e)
+ }
+
+ // starting grpc server
+ grpcPort := *masterOptions.port + 10000
+ grpcL, err := util.NewListener(*masterOptions.ipBind+":"+strconv.Itoa(grpcPort), 0)
+ if err != nil {
+ glog.Fatalf("master failed to listen on grpc port %d: %v", grpcPort, err)
+ }
+ grpcS := pb.NewGrpcServer(security.LoadServerTLS(util.GetViper(), "grpc.master"))
+ master_pb.RegisterSeaweedServer(grpcS, ms)
+ reflection.Register(grpcS)
+ glog.V(0).Infof("Start Seaweed Master %s grpc server at %s:%d", util.Version(), *masterOptions.ip, grpcPort)
+ go grpcS.Serve(grpcL)
+
+ go ms.MasterClient.KeepConnectedToMaster()
+
+ // start http server
+ httpS := &http.Server{Handler: r}
+ go httpS.Serve(masterListener)
+
+ select {}
+}
diff --git a/weed/pb/grpc_client_server.go b/weed/pb/grpc_client_server.go
index fac8adcb3..15dc917e9 100644
--- a/weed/pb/grpc_client_server.go
+++ b/weed/pb/grpc_client_server.go
@@ -213,6 +213,21 @@ func WithMasterClient(master string, grpcDialOption grpc.DialOption, fn func(cli
}
+func WithOneOfGrpcMasterClients(masterGrpcAddresses []string, grpcDialOption grpc.DialOption, fn func(client master_pb.SeaweedClient) error) (err error) {
+
+ for _, masterGrpcAddress := range masterGrpcAddresses {
+ err = WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
+ client := master_pb.NewSeaweedClient(grpcConnection)
+ return fn(client)
+ }, masterGrpcAddress, grpcDialOption)
+ if err == nil {
+ return nil
+ }
+ }
+
+ return err
+}
+
func WithBrokerGrpcClient(brokerGrpcAddress string, grpcDialOption grpc.DialOption, fn func(client messaging_pb.SeaweedMessagingClient) error) error {
return WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
diff --git a/weed/pb/master.proto b/weed/pb/master.proto
index 6ef27fb4d..ce8a6dc12 100644
--- a/weed/pb/master.proto
+++ b/weed/pb/master.proto
@@ -275,6 +275,8 @@ message GetMasterConfigurationResponse {
repeated StorageBackend storage_backends = 3;
string default_replication = 4;
string leader = 5;
+ uint32 volume_size_limit_m_b = 6;
+ bool volume_preallocate = 7;
}
message ListMasterClientsRequest {
diff --git a/weed/pb/master_pb/master.pb.go b/weed/pb/master_pb/master.pb.go
index 75e165ed6..46dad9325 100644
--- a/weed/pb/master_pb/master.pb.go
+++ b/weed/pb/master_pb/master.pb.go
@@ -2297,6 +2297,8 @@ type GetMasterConfigurationResponse struct {
StorageBackends []*StorageBackend `protobuf:"bytes,3,rep,name=storage_backends,json=storageBackends,proto3" json:"storage_backends,omitempty"`
DefaultReplication string `protobuf:"bytes,4,opt,name=default_replication,json=defaultReplication,proto3" json:"default_replication,omitempty"`
Leader string `protobuf:"bytes,5,opt,name=leader,proto3" json:"leader,omitempty"`
+ VolumeSizeLimitMB uint32 `protobuf:"varint,6,opt,name=volume_size_limit_m_b,json=volumeSizeLimitMB,proto3" json:"volume_size_limit_m_b,omitempty"`
+ VolumePreallocate bool `protobuf:"varint,7,opt,name=volume_preallocate,json=volumePreallocate,proto3" json:"volume_preallocate,omitempty"`
}
func (x *GetMasterConfigurationResponse) Reset() {
@@ -2366,6 +2368,20 @@ func (x *GetMasterConfigurationResponse) GetLeader() string {
return ""
}
+func (x *GetMasterConfigurationResponse) GetVolumeSizeLimitMB() uint32 {
+ if x != nil {
+ return x.VolumeSizeLimitMB
+ }
+ return 0
+}
+
+func (x *GetMasterConfigurationResponse) GetVolumePreallocate() bool {
+ if x != nil {
+ return x.VolumePreallocate
+ }
+ return false
+}
+
type ListMasterClientsRequest struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@@ -3251,7 +3267,7 @@ var file_master_proto_rawDesc = []byte{
0x16, 0x0a, 0x14, 0x56, 0x61, 0x63, 0x75, 0x75, 0x6d, 0x56, 0x6f, 0x6c, 0x75, 0x6d, 0x65, 0x52,
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@@ -3268,16 +3284,38 @@ var file_master_proto_rawDesc = []byte{
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@@ -3285,105 +3323,90 @@ var file_master_proto_rawDesc = []byte{
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}
var (
diff --git a/weed/server/master_grpc_server_volume.go b/weed/server/master_grpc_server_volume.go
index 4132ce690..314db363f 100644
--- a/weed/server/master_grpc_server_volume.go
+++ b/weed/server/master_grpc_server_volume.go
@@ -68,10 +68,6 @@ func (ms *MasterServer) ProcessGrowRequest() {
func (ms *MasterServer) LookupVolume(ctx context.Context, req *master_pb.LookupVolumeRequest) (*master_pb.LookupVolumeResponse, error) {
- if !ms.Topo.IsLeader() {
- return nil, raft.NotLeaderError
- }
-
resp := &master_pb.LookupVolumeResponse{}
volumeLocations := ms.lookupVolumeId(req.VolumeIds, req.Collection)
diff --git a/weed/server/master_server.go b/weed/server/master_server.go
index 273d6ba7d..d2edeb6cb 100644
--- a/weed/server/master_server.go
+++ b/weed/server/master_server.go
@@ -44,6 +44,7 @@ type MasterOption struct {
DisableHttp bool
MetricsAddress string
MetricsIntervalSec int
+ IsFollower bool
}
type MasterServer struct {
@@ -145,7 +146,9 @@ func NewMasterServer(r *mux.Router, option *MasterOption, peers []string) *Maste
ms.ProcessGrowRequest()
- ms.startAdminScripts()
+ if !option.IsFollower {
+ ms.startAdminScripts()
+ }
return ms
}
@@ -193,8 +196,8 @@ func (ms *MasterServer) proxyToLeader(f http.HandlerFunc) http.HandlerFunc {
proxy.Transport = util.Transport
proxy.ServeHTTP(w, r)
} else {
- // drop it to the floor
- // writeJsonError(w, r, errors.New(ms.Topo.RaftServer.Name()+" does not know Leader yet:"+ms.Topo.RaftServer.Leader()))
+ // handle requests locally
+ f(w, r)
}
}
}